iwmc3200wifi: Return proper error for iwm_if_alloc

In the case of alloc_netdev_mq failure and kmalloc failure,
current implementation returns ERR_PTR(0).

As a result, the caller of iwm_if_alloc does not catch the error by IS_ERR
macro. Fix it by setting proper error code for ret variable in the failure
cases.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwmc3200wifi/netdev.c b/drivers/net/wireless/iwmc3200wifi/netdev.c
index 13a69ebf2a94..5091d77e02ce 100644
--- a/drivers/net/wireless/iwmc3200wifi/netdev.c
+++ b/drivers/net/wireless/iwmc3200wifi/netdev.c
@@ -126,6 +126,7 @@ void *iwm_if_alloc(int sizeof_bus, struct device *dev,
         ndev = alloc_netdev_mq(0, "wlan%d", ether_setup, IWM_TX_QUEUES);
         if (!ndev) {
                 dev_err(dev, "no memory for network device instance\n");
+                ret = -ENOMEM;
                 goto out_priv;
         }
 
@@ -138,6 +139,7 @@ void *iwm_if_alloc(int sizeof_bus, struct device *dev,
                                     GFP_KERNEL);
         if (!iwm->umac_profile) {
                 dev_err(dev, "Couldn't alloc memory for profile\n");
+                ret = -ENOMEM;
                 goto out_profile;
         }